y = [-100, 1, 'insert', 0, 'abc', [11, 22], 55, 66, 77, 100, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4]
y.remove(1)

print(y) # [-100, 'insert', 0, 'abc', [11, 22], 55, 66, 77, 100, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4]